Sheet-metal roofing.



E. W. EDWARDS. SHEET METAL ROOFING. APPLICATION FILED JAN.10, 1914.

Patented Mar. 24, 1914 EDWARD (FM. EDWARDS, OF CINCINNATI, OHIO.

SHEET-METAL ROOFING.

Specification of Letters Iatent.

Application filed January 10, 1914. Serial No. 811,302.

To all tuho-m it may concern Be it known that I, EDWARD WM. ED-

WARDS, a citizen of the United States, and a resident of Cincinnati, county of Hamilton, State of Ohio, have invented certain new and useful Improvements in Sheet-Metal Roofing, of which the following is a full and clear specification, reference .being had to the accompanying drawings, in which- Figure l is a perspective view showing three adjacent sheets of the metal roofing connected together; Fig.2 is a transverse vertical section through one of the lock joints; and Fig. '3 is a similar view showing one of the sheets in the position it assumes when bulged or ballooned by high wind.

This invention relates to that type of sheet metal roofing in which lar e sheet metal sheets are employed, the ad acent overlapping edges of these sheets being detachably locked together in such manner as to prevent ingress of water at any point along the joint, one sample of this type of roofing being shown in patents to H. E. Moomaw, No. 1,072,025, dated September 2, 1913, and No. 884,285, dated April 7, 1908.

The object of this invention is to provide a joint which will hold the sheets in-interlocking relation under all conditions and also to avoid all sharp'bends or folds in the metal, to thereby avoid cracking or peeling of the tin or galvanized coating usually applied to roofing metal sheets.

In the drawings annexed, the numeral 2 indicates the main body of the sheet, along one edge of which is formed a ridge 3 andat the other edge a corresponding ridge 4, these two ridges being approximately .the same shape in cross section. Outside of the ridge 4 'is formed a nailing flange 5 and inside of this ridge 4 is a channel 6, which is formed by folding the metal longitudinally upon itself, this channel facing the adjacent wall of ridge 4. The fold 7 which forms the top of the channel 6 projects to within a short distance of the adjacent wall of the .ridge 4. The metal at the two-fold lines 8 and 9 is not folded or bent sharply, these folds being well rounded, the bend in the metal being approximately a semi-circle.

The outer wall 10 of the ridge 4 is slightly convex,while the inner wall 11 of this ridge is inclined upwardly and inwardly, so as to partly overhang the throat formedbetween.

the fold 7 and said inclined wall. At the other edge ofthe sheet the ridge is formed in the same manner as the aforesaid ridge 4, namely, with a convex wall 12 and an inclmed wall 13, and outside of the wall 13, the extreme longitudinal edge of the sheet, the sheet 1s formed into a curved flange 14.

I It will be observed that to interlock the edges of the sheets the flange 14 is inserted 1n the channel 6 and the walls 13 and 12 fit down closely over the walls 11 and 10 of the ridge on the other sheet. At the juncture of the lip or flange 14 and the wall 13, the fold Patented Mar. 24, 1914..

is well rounded as is likewise the fold at the base of the wall 11 of the companion ridge,

sothat when the parts are in position, these corner folds fit snugly together.

It will be observed that contraction of the sheets under the heat of the sun will cause interlock, by reason of the inclination of the walls, the stronger the tension of the sheet the greater being the interlocking action. Expansion of the sheets'will simply cause the walls 13 and 11 to slightly separate, but will not permit the parts to be disthe inclined walls of the ridges to tightly connected. Should high winds balloon or be understood when it is kept in mind that D the roofing sheets are made quite large and are, there ore, capable of considerable of a ballooning or bulging action in case high winds get under the sheets. It will be observed also that with my construction I avoid all sharp bends along the fold lines and thus avoid the cracking or peeling of the surfacing metal, the result of this being that deterioration of the sheets by reason of rust will be greatly postponedf Having thus described my invention, I claimis:

A sheet metal roofing plate having a r dge parallel with and a short distance from each of its side edges, these ridges being approximately the same shape in cross section, the

what

outer wall of one of the ridges being inmetal extending close to said inclined wall, clined toward the adjacent edge of the sheet for the purposes set forth. lo and the inner wall-of the other ridge being In testimony whereof I hereunto aflix my inclined away from the edge of the sheet, signature in the presence of two witnesses.

5 the sheet at a point close to the last named EDWVARD WM. EDWARDS.

inclined ridge wall being longitudinally Witnesses: folded upon itself to form a channel facing O. S. LARKLY,

0 said inclined wall, the folded part of the E. G. HAINES. 

